Group A observations are 1, 2, 3; group B observations are 3, 4,
5; group C...
Group A observations are 1, 2, 3; group B observations are 3, 4,
5; group C observations are 5, 6, 7. Make a table of these
observations with each group as a column. Perform a one-way ANOVA
test. What is the null hypothesis? Calculate each term of the ANOVA
table (e.g., compute the sum of squares, degrees of freedom). What
is the F-statistic? If a = .05, what is the result of your
hypothesis test?
HW 6: z-test, t-test for independent samples, t-test for related
samples, 1-way ANOVA
Researchers wanted to...
HW 6: z-test, t-test for independent samples, t-test for related
samples, 1-way ANOVA
Researchers wanted to explore different treatment methods to
effect memory skills in high school freshmen. Subjects were given a
memory test (under multiple conditions) these were the results:
Group 1
10, 8, 9, 11,
8, 9, 7, 6,
9, 8
Group 2
12, 10,
11, 9, 13, 8, 9, 12, 11, 11
Group 3
10, 9, 10, 9, 11,
8, 7, 9, 10, 11...
Consider the following data, which represent the number of times
individuals have visited a physician in...
Consider the following data, which represent the number of times
individuals have visited a physician in the last 12 months.
2, 5, 4, 3, 3, 1, 0, 1, 0, 0, 7, 13, 5, 4, 3, 6, 9
i. Physicians’ offices in the area budget for 3 visits per year,
per patient. Suppose researchers are interested in whether
individuals do not visit their physicians exactly 3 times per year.
Construct an appropriate pair of hypotheses that could be used to
test...
2
3
4
5
6
7
&n
2
3
4
5
6
7
8
6216 12674
18702 24978 18552 12678 6200
Table II
X
Frequency
Relative Freq.
2
6216
0.06216
3
12674
0.12674
4
18702
0.18702
5
24978
0.24978
6
18552
0.18552
7
12678
0.12678
8
6200
0.062
Use your table to calculate the total amount of money your
group won. It is important to show your work on this exercise.
X*F
12432
38022
74808
124,890
111,312
88,746
49,600
Total = $499,810
How much did...
A researcher conducts a two-way ANOVA test with interaction and
provides the following ANOVA table.
a....
A researcher conducts a two-way ANOVA test with interaction and
provides the following ANOVA table.
a.
Find the missing values in the
ANOVA table. (Round your answers to 2 decimal
places.)
ANOVA
Source of
Variation
SS
df
MS
F
p-value
F
crit
Sample
766.98
2
MSB
=
Ffactor B =
0.0109
3.885
Columns
12,122.69
1
MSA
=
Ffactor A =
0
4.747
Interaction
57.60
2
MSAB
=
FInteraction =
0.6148
3.885
Within
682.14
12
MSE
=
Total
13,629.41
17
1. Consider the data 2, 4, 6, 8, 10, 12 and 14. Store them in
?1,...
1. Consider the data 2, 4, 6, 8, 10, 12 and 14. Store them in
?1, and then
(a) Take samples of size 2 with replacement from this
population, list all your samples in the table below:
2,2
2,4
2,6
2,8
4,2
4,4
4,6
6,2
8,2
10,2
(b) Now find the mean of each sample, and place all the sample
means in the table below:
2
3
4
5
6
7
3
4
4
(c) Complete the following probability distribution...
Consider the following time series data.
Quarter
Year 1
Year 2
Year 3
1
4
6...
Consider the following time series data.
Quarter
Year 1
Year 2
Year 3
1
4
6
7
2
2
3
6
3
3
5
6
4
5
7
8
Use a multiple regression model with dummy variables as follows
to develop an equation to account for seasonal effects in the data.
Qtr1 = 1 if Quarter 1, 0 otherwise; Qtr2 = 1 if Quarter 2, 0
otherwise; Qtr3 = 1 if Quarter 3, 0 otherwise. If required, round
your answers...